The movie business isn’t all glitz and glamour, a fact made painfully clear in a newly released trailer for “An Education” director Lone Scherfig’s latest film, “Their Finest.” In it, we see the sexism that a female screenwriter has to put up with. “We’ll need someone to write the slop,” Catrin (Gemma Arterton, “Quantum of Solace”) is told. By slop, her employer means “women’s dialogue.” And what’s more, Catrin will get “no screen credit.” He continues, “Obviously we can’t pay you as much as the chaps.” “Their Finest” takes place in Great Britain in 1940, but it’s all too easy to draw parallels to Hollywood today.

The WWII-set dramedy sees Catrin hired to pen dialogue in propaganda films, which are being produced by the British Ministry in an effort to boost Brits’ spirits during the trying, depressing war. Catrin’s husband (Jack Huston, “Boardwalk Empire”) is an artist who values his career above hers, despite the fact that she’s clearly blossoming and gaining confidence through the job. She makes her mark in a male-dominated industry, providing valuable contributions to the productions she works on. Catrin’s talents don’t go unnoticed: She forms special bonds with a fellow writer (Sam Claflin, “Me Before You”) and an aging, ego-maniacal actor (Bill Nighy, “Love Actually”) on the set of a movie based on the Battle of Dunkirk.

“Their Finest” made its world premiere at the Toronto International Film Festival. The film is based on “Their Finest Hour and a Half,” Lissa Evans’ 2010 novel. The book was adapted for the screen by Gaby Chiappe (“EastEnders”).

The film is produced by Amanda Posey, Finola Dwyer, Elizabeth Karlsen, and Stephen Woolley, and Rachel Portman composed the score.

“An Education” was nominated for Best Picture at the 2010 Academy Awards. Scherfig’s other credits include “The Riot Club,” “One Day,” and “Just Like Home.”

“Their Finest” hits U.S. theaters March 24. Check out the charming trailer below.